Concluding part of H. B. Gordon's series on identifying fibers by microscope, covering the minor hair fibers. It describes the microscopic appearance of mohair, camel, alpaca and llama, vicuna, cashmere, common goat, white rabbit, cow, horse and human hair, noting scale visibility, medulla and fiber fineness. Illustrated with photomicrographs (Figs. 14-25) at 100x to 125x magnification.